This underwater ROV (Remotely Operated Vehicle) by SpaceShipOne is sure to impress. It features four thrusters, remote control, and most importantly for this site, a camera.
For your average DIY person an ROV is a great project. They aren’t too difficult to make, they are easily customized, and they can be used to accomplish cool things. In the case of this underwater ROV you could use it to explore depths in detail that you couldn’t before. For instance, a small cave where diving is not safe.
The camera system below is simple, but should get the job done. Check it out in the pictures below!